ChemElectroChem最新文献

Electrochemical Evaluation of Chromium Mixtures With N,O-Containing Ligands for Iron–Chromium Flow Batteries 铁铬液流电池中含氮氧配体铬混合物的电化学评价

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-05 DOI: 10.1002/celc.70344

Qiujun Li, Eduardo Martínez-González, Mohammed Amine Hammouali, Petri Pihko, Pekka Peljo

{"title":"Electrochemical Evaluation of Chromium Mixtures With N,O-Containing Ligands for Iron–Chromium Flow Batteries","authors":"Qiujun Li, Eduardo Martínez-González, Mohammed Amine Hammouali, Petri Pihko, Pekka Peljo","doi":"10.1002/celc.70344","DOIUrl":"https://doi.org/10.1002/celc.70344","url":null,"abstract":"In this work, a series of chromium mixtures with N,O-containing ligands were evaluated as candidate negolytes for iron–chromium flow batteries. Six systems were investigated, including three prepared with a single ligand and three prepared with pairs of chemically distinct ligands. The structurally characterized mixture-1 was used as the reference, whereas the exact chromium coordination structures of mixtures 2–6 were not established. UV–vis spectroscopy was used to estimate the dissolved chromium concentrations of the studied mixtures in 1 M KCl. The results show that combining chemically distinct ligands increases dissolved chromium concentration, reaching up to approximately 150 mM compared with 13.5 mM for mixture 1. Cyclic voltammetry revealed that five electrochemically evaluated mixtures displayed quasireversible redox behavior, whereas one mixture did not show any clear redox activity. However, flow-cell cycling of these electroactive mixtures at a nominal concentration of 10 mM revealed limited capacity utilization and substantial capacity fading. These results show that increasing the dissolved chromium concentration alone does not ensure improved electrochemical accessibility or stable flow-cell cycling. Further optimization and solution-speciation studies are required to improve cycling stability and identify the chromium species responsible for the observed electrochemical behavior.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 22","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70344","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Electrochemical Activation Methods on the Restructuring and Oxygen Reduction Performance of PtNix “Core–Shell” Carbon-Nitride/Carbon Supported Electrocatalysts 电化学活化方法对PtNix“核壳”型碳氮/碳负载型电催化剂结构调整和氧还原性能的影响

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-05 DOI: 10.1002/celc.70338

Enrico Negro, Angeloclaudio Nale, Gioele Pagot, Giuseppe Pace, Pawel J. Kulesza, Iwona A. Rutkowska, Vito Di Noto

{"title":"Effects of Electrochemical Activation Methods on the Restructuring and Oxygen Reduction Performance of PtNix “Core–Shell” Carbon-Nitride/Carbon Supported Electrocatalysts","authors":"Enrico Negro, Angeloclaudio Nale, Gioele Pagot, Giuseppe Pace, Pawel J. Kulesza, Iwona A. Rutkowska, Vito Di Noto","doi":"10.1002/celc.70338","DOIUrl":"https://doi.org/10.1002/celc.70338","url":null,"abstract":"This work presents hierarchical PtNi10-CNl 900/Hd electrocatalysts (ECs) for the oxygen reduction reaction (ORR), where “l” denotes low N (<5 wt%), “900” the final pyrolysis temperature in °C, and “Hd” the 1:1 Gr/C support. Their “core–shell” architecture combines defective graphene nanoplatelets (Gr) and Vulcan XC-72R carbon black (C), exploiting complementary functions, with a carbon nitride (CN) “shell” coordinating PtNix active sites. The common precursor P derives from a 3D-crosslinked zeolitic inorganic-organic polymer electrolyte (Z-IOPE) embedding the nanocomposite carbon “core” and contains Ni-rich, sub-micrometric PtNi10 domains. A flow-through electrochemical setup activates P through reversible-potential-sweep (RS), constant-potential (CP), and constant-current (CC) methods. These elementary profiles are investigated as modular building blocks for specific EC systems. The recovered powders undergo extensive conventional physicochemical characterization and are incorporated into membrane-electrode assemblies (MEAs) using conventional procedures. “Ex -situ” analyses demonstrate extensive Ni removal and restructuring toward Pt-rich nanostructures, while rotating ring–disk electrode (RRDE) measurements reveal markedly higher ORR activity than Pt/C. Single-cell proton-exchange membrane fuel cell (PEMFC) testing reveals method-dependent differences under transport-sensitive high-current conditions. CP provides the most favorable overall compromise and remains the most promising building block for custom, potentially scalable activation methods.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 22","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70338","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catharanthus roseus-Assisted Synthesis of Zirconia Nanoparticles for Electrochemical Determination of Nitrobenzene 花楸花辅助合成氧化锆纳米颗粒电化学测定硝基苯

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-05 DOI: 10.1002/celc.70345

Jemibha P., Karmegam Muthukrishnan, Venkatachalam Vinothkumar, Chandrasekaran Dhanush, Darlin Mary A., Tae Hyun Kim

{"title":"Catharanthus roseus-Assisted Synthesis of Zirconia Nanoparticles for Electrochemical Determination of Nitrobenzene","authors":"Jemibha P., Karmegam Muthukrishnan, Venkatachalam Vinothkumar, Chandrasekaran Dhanush, Darlin Mary A., Tae Hyun Kim","doi":"10.1002/celc.70345","DOIUrl":"https://doi.org/10.1002/celc.70345","url":null,"abstract":"Nitrobenzene (NB) is a toxic, persistent pollutant widely used in manufacturing pesticides, dyes, explosives, and preservatives, and its detection demands sensitive and reliable analytical methods. Electrochemical techniques are attractive for NB detection owing to their low cost, simplicity, and ease of operation. Herein, we report a simple and green synthesis of zirconia nanoparticles (ZrO2 NPs) assisted by Catharanthus roseus (CR) flower extract. Structural characterization by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy confirmed the formation of monoclinic-phase CR-ZrO2 NPs with particle sizes of 20–25 nm. The electrochemical performance of the CR-ZrO2-modified glassy carbon electrode (CR-ZrO2/GCE) toward NB reduction was evaluated using cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Under optimized conditions, the sensor exhibited good electrocatalytic activity toward NB reduction via a four-electron/four-proton transfer mechanism, with a detection range of 1–150 µM and a limit of detection of 0.51 µM. The sensor also showed good selectivity, precision, and storage stability, along with satisfactory practical applicability for river water sample analysis. These findings highlight the promising potential of CR-ZrO2 NPs for electrochemical monitoring of environmental pollutants.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 22","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer-Modulated Fructose Dehydrogenase Bioelectrocatalysis on Highly Porous Gold Electrodes for Direct Electron Transfer Fructose Sensing in Fermentation Broth 聚合物调节果糖脱氢酶在高孔金电极上的生物电催化用于发酵液中直接电子转移果糖传感

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-05 DOI: 10.1002/celc.70346

Verdiana Marchianò, Alessandra Cimino, Angelo Tricase, Yohei Suzuki, Eole Fukawa, Keisei Sowa, Angela Stefanachi, Francesco Leonetti, Eleonora Macchia, Nicoletta Ditaranto, Luisa Torsi, Paolo Bollella

{"title":"Polymer-Modulated Fructose Dehydrogenase Bioelectrocatalysis on Highly Porous Gold Electrodes for Direct Electron Transfer Fructose Sensing in Fermentation Broth","authors":"Verdiana Marchianò, Alessandra Cimino, Angelo Tricase, Yohei Suzuki, Eole Fukawa, Keisei Sowa, Angela Stefanachi, Francesco Leonetti, Eleonora Macchia, Nicoletta Ditaranto, Luisa Torsi, Paolo Bollella","doi":"10.1002/celc.70346","DOIUrl":"https://doi.org/10.1002/celc.70346","url":null,"abstract":"Herein, an amperometric fructose biosensor is developed by immobilizing fructose dehydrogenase (FDH) on highly porous gold (h-PG) electrodes modified with polymeric interlayers. Poly(acrylic acid) (PAA), poly(vinyl alcohol) (PVA), and poly(diallyldimethylammonium chloride) (PDDA) are used to tune the enzyme–electrode interface, generating h-PG/PAA/FDH, h-PG/PVA/FDH, and h-PG/PDDA/FDH bioelectrodes. The h-PG layer, prepared by hydrogen-bubble-assisted electrodeposition, exhibits 18–46 µm pores, nanocoral-like Au features, and an electroactive area of 26 ± 3 cm2, about 300 times larger than bare Au. SEM, cyclic voltammetry, and XPS confirm the porous morphology and polymer deposition. The polymer interface controls FDH bioelectrocatalysis. h-PG/PAA/FDH shows the lowest fructose oxidation onset potential, −0.063 ± 0.005 V, and the highest catalytic current, 32 ± 4 µA at +0.205 V with 10 mM D-fructose. Amperometry provides a 0.02–1 mM linear range, KMapp = 6.4 ± 0.8 mM, sensitivity of 6.4 ± 0.2 µA mM−1, and LOD of 5 µM. h-PG/PAA/FDH retains 95% of its initial response after 180 days in fermentation broth and enables fructose monitoring during Gluconobacter oxydans cultivation. These results identify PAA as the most effective interlayer among those investigated for FDH stabilization, direct electron transfer, and lower onset potential (Eonset) for fructose sensing in complex fermentation broth matrices.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 22","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure-Dependent Impact of Organic Water Contaminants on Nickel Surface Chemistry and Water Splitting Performance 有机水污染物对镍表面化学和水分解性能的结构影响

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-05 DOI: 10.1002/celc.70337

Philipp Lemm, Paula Barione Perroni, Kateryna Loza, Emmanuel Prince Foguieng Oumbe, André Olean-Oliveira, Ioannis Spanos, Viktor Čolić, Corina Andronescu, Benjamin Mockenhaupt, Stephan Barcikowski

{"title":"Structure-Dependent Impact of Organic Water Contaminants on Nickel Surface Chemistry and Water Splitting Performance","authors":"Philipp Lemm, Paula Barione Perroni, Kateryna Loza, Emmanuel Prince Foguieng Oumbe, André Olean-Oliveira, Ioannis Spanos, Viktor Čolić, Corina Andronescu, Benjamin Mockenhaupt, Stephan Barcikowski","doi":"10.1002/celc.70337","DOIUrl":"https://doi.org/10.1002/celc.70337","url":null,"abstract":"Anion exchange membrane water electrolysis (AEMWE) is a promising technology for sustainable hydrogen production but currently relies on highly purified water. Its large-scale implementation would benefit from alternative water sources. However, the effects of dissolved contaminants, particularly organic compounds such as aromatic amines, remain poorly understood. We therefore investigated structurally distinct aromatic amines as model contaminants to evaluate their effects on the water splitting performance of nickel electrodes. Electrochemical measurements, product analysis, and operando interfacial characterization were combined to identify structure-dependent effects and mechanisms of catalyst deactivation and recovery. Aniline severely suppressed the oxygen evolution reaction, whereas its methyl-substituted derivatives had negligible effects. Complementary analyses attributed this inhibition to the potential-dependent accumulation of an aniline-derived, polyaniline-like surface layer. This layer progressively modified the NiOOH/electrolyte interface, impeded interfacial charge transfer, and reduced oxygen evolution. These findings contribute to fundamental insights into how organic contaminants originating from feedwater or the degradation of polymeric electrolyzer components interact with nickel-based electrodes, providing valuable guidance for defining feedwater-quality requirements of future AEMWE systems.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 22","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70337","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal–Organic Decomposition Ink-Derived Cu Foams Enable High Formate Selectivity and Methanol Conversion 金属有机分解油墨衍生的Cu泡沫实现高甲酸选择性和甲醇转化

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-05 DOI: 10.1002/celc.70343

Julian Neumann, Vera Ubbenjans, Martina Feldhoff, Eric Trushin, Matthias Wessling, Robert Keller

{"title":"Metal–Organic Decomposition Ink-Derived Cu Foams Enable High Formate Selectivity and Methanol Conversion","authors":"Julian Neumann, Vera Ubbenjans, Martina Feldhoff, Eric Trushin, Matthias Wessling, Robert Keller","doi":"10.1002/celc.70343","DOIUrl":"https://doi.org/10.1002/celc.70343","url":null,"abstract":"High-surface-area electrodes are required to sustain industrially relevant current densities during selective methanol oxidation to formate. Here, particle-free Cu metal–organic decomposition (MOD) inks based on Cu(II) formate tetrahydrate and monoisopropanolamine are repurposed as solution-derived precursor coatings for porous Cu foams. Dip coating under ultrasonication and low-temperature calcination generate granular Cu structures on the foam surface and in the examined cross-sectional regions. The resulting MOD Cu foams exhibit substantially increased apparent mass-normalized double-layer capacitance and reconstruct under anodic operation into Cu(II)-rich interfaces with electrochemical behavior consistent with transient formation of Cu(III)-containing species. In zero-gap flow-cell methanol oxidation, the best-performing MOD(1:1.5) Cu foam reached a maximum formate Faradaic efficiency of 93.9% at 10% methanol conversion and a final methanol conversion of 72.2%, outperforming untreated Cu foam in both selectivity and conversion. These results establish MOD inks as a scalable route to structured Cu electrodes for selective liquid-phase electrosynthesis.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 22","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70343","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO2 Electroreduction in a Membrane Electrode Assembly Electrolyzer: Cell Potential Optimization 膜电极组合电解槽中的CO2电还原：电池电位优化

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-11-02 DOI: 10.1002/celc.70330

Candice Pérou, Domenico Grammatico, Ngoc-Huan Tran, Marc Fontecave

{"title":"CO2 Electroreduction in a Membrane Electrode Assembly Electrolyzer: Cell Potential Optimization","authors":"Candice Pérou, Domenico Grammatico, Ngoc-Huan Tran, Marc Fontecave","doi":"10.1002/celc.70330","DOIUrl":"https://doi.org/10.1002/celc.70330","url":null,"abstract":"In order to move the carbon dioxide electroreduction (CO2R) technology forward towards industrial implementation, it is requested to develop electrochemical cells achieving the lowest cell voltages. Indeed, a critical barrier to the industrial deployment of CO2 electrolyzers resides in the high cost of electricity required to operate the system. As a consequence, techno-economic analyses have identified, for Cu-based CO2R to C1–C3 products, a maximal target of 2.5 V for the cell voltage at current densities of at least 100–300 mA cm−2. Among the various types of electrolyzers, membrane electrode assembly (MEA) cells have gained significant attention as they display the lowest cell voltages. Here we report an assessment of some key individual MEA system-level parameters, including anode design, membrane selection, anolyte composition, CO2 flow rate, temperature, which collectively influence the overall cell potential. We find that cell voltages in the 2.0–2.5 V range can be obtained, including with bicarbonate/carbonate electrolytes, while the lowest values were achieved in KOH.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 21","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70330","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149355945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights Into the Electrochemical Response of Commercial Carbon Screen-Printed Electrodes 商业碳丝网印刷电极的电化学响应研究

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-10-30 DOI: 10.1002/celc.70339

Anna Secundo, Giorgia Ballabio, Giuseppe Cappelletti, Gianlorenzo Bussetti, Yuwei Zhang, Valentina Pifferi, Luigi Falciola

{"title":"Insights Into the Electrochemical Response of Commercial Carbon Screen-Printed Electrodes","authors":"Anna Secundo, Giorgia Ballabio, Giuseppe Cappelletti, Gianlorenzo Bussetti, Yuwei Zhang, Valentina Pifferi, Luigi Falciola","doi":"10.1002/celc.70339","DOIUrl":"https://doi.org/10.1002/celc.70339","url":null,"abstract":"Commercial carbon-based screen-printed electrodes (SPEs) are extensively used across a wide range of fields, particularly as versatile platforms for subsequent modification with nanomaterials, biomolecules, and complex functional systems. These modifications enable the development of sensors for diverse applications, including environmental monitoring, clinical diagnostics, point-of-care testing, quality control, and food safety analysis. Despite their widespread use, the specific type of commercial electrode selected is often treated as a secondary factor, although its influence on analytical performance should not be underestimated. In this study, six commercially available carbon-based SPEs were investigated by comparing their electrochemical behavior using cyclic voltammetry and electrochemical impedance spectroscopy. Both outer- and inner-sphere redox probes were employed to provide complementary insights into electrochemical performance. These electrochemical measurements were combined with wettability, topography, and surface characterizations to better understand how variations in surface heterogeneity contribute to differences in electrochemical reversibility, mass transport regimes, and current intensity. Furthermore, the results highlight that electrode performance variability arises not only between different commercial SPEs, but also from repeated measurements on the same electrode and from changes in experimental configuration, such as conventional bulk solution measurements compared to droplet-based setups, emphasizing the critical role of testing conditions.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 21","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70339","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From Microfluidic Screening to Pre-Pilot-Scale: TEMPO-Mediated Electrooxidation of Furfural to Furoic Acid 从微流控筛选到预中试规模：tempo介导的糠醛电氧化成呋喃酸

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-10-29 DOI: 10.1002/celc.70342

Jacopo De Bellis, Riccardo Zaffaroni, Pim J. L. Broersen, Henning Hanisch, Vito Pol, Catarina Simões, Erwin Giling

{"title":"From Microfluidic Screening to Pre-Pilot-Scale: TEMPO-Mediated Electrooxidation of Furfural to Furoic Acid","authors":"Jacopo De Bellis, Riccardo Zaffaroni, Pim J. L. Broersen, Henning Hanisch, Vito Pol, Catarina Simões, Erwin Giling","doi":"10.1002/celc.70342","DOIUrl":"https://doi.org/10.1002/celc.70342","url":null,"abstract":"This study demonstrates the stepwise development and scale-up of TEMPO-mediated furfural electrooxidation to furoic acid as a biobased route to a specialty chemical of growing industrial relevance. Initial screening in a microfluidic electrochemical flow cell identified acetamido-TEMPO as an effective mediator for selective furfural oxidation on graphite felt under alkaline conditions, enabling high furoic acid selectivity at relatively low anodic potentials while limiting overoxidation through appropriate control of cell potential and substrate supply. Subsequent laboratory-scale batch-recirculation experiments confirmed stable mediator performance, near-complete per-pass selectivity, and Faradaic efficiencies typically above 75%–90%. Translation to a bench-scale cell further validated the robustness of the process, producing approximately 50 g of furoic acid with closed mass balance, near-complete selectivity, and stable operation under continuous substrate and base dosing. Further scale-up to a five-cell stack configuration demonstrated successful pre-pilot operation. Improvements in cell architecture and flow-through electrode design reduced ohmic losses and enhanced electrode utilization, enabling the production of approximately 450 g of furoic acid with concentrations up to 1.9 M in the electrolyte. These results highlight the importance of cell architecture, flow distribution, pH control, and ion transport during scale-up, while demonstrating the practical potential of mediated electrochemical synthesis for sustainable furoic acid production.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 21","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70342","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Engineering Mass Transport for Scalable Acidic Nitrate-to-Ammonia Electrolysis in a Continuous Flow Reactor 连续流反应器中可扩展酸性硝酸盐制氨电解的工程质量传递

IF 5.2 4区化学

ChemElectroChem Pub Date : 2026-10-27 DOI: 10.1002/celc.70333

Yannick Sebastian Mürtz, Franz Röllgen, Ulrich Simon, Matthias Wessling, Robert Keller

{"title":"Engineering Mass Transport for Scalable Acidic Nitrate-to-Ammonia Electrolysis in a Continuous Flow Reactor","authors":"Yannick Sebastian Mürtz, Franz Röllgen, Ulrich Simon, Matthias Wessling, Robert Keller","doi":"10.1002/celc.70333","DOIUrl":"https://doi.org/10.1002/celc.70333","url":null,"abstract":"The electrochemical reduction of nitrate to ammonia (<math></math>) presents a sustainable pathway to valorize nitrate-contaminated wastewater while enabling decentralized ammonia production. Despite promising advances in catalyst development, most studies rely on batch-type or single-pass electrochemical cells, which are often encompassed by high mass-transfer resistances or noncontinuous operation, hindering scalability and process control. In this work, we investigate nitrate reduction in a temperature-controlled, continuous-flow feed-and-bleed reactor equipped with a copper foam cathode, designed to decouple conversion and mass transfer, which enables high reaction rates at high conversion. At low current densities (<math></math>), Faraday efficiencies (FE) toward <math></math> reached up to 94%, with minimal <math></math> and <math></math> formation at steady-state <math></math> concentrations below <math></math>. Increasing flow rates improved mass transport and suppressed the hydrogen evolution reaction, but also increased the loss of intermediates to the bulk. Analysis of steady-state nitrate concentrations and partial currents confirmed that the process is limited by mass transport under high current conditions. Increasing the recirculation flow rate proved essential to sustain a high FE at industrially relevant conditions and low reactant concentrations.","PeriodicalId":142,"journal":{"name":"ChemElectroChem","volume":"13 21","pages":""},"PeriodicalIF":5.2,"publicationDate":"2026-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/celc.70333","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149356387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0